7426521 has 12 divisors (see below), whose sum is σ = 10810800. Its totient is φ = 4912440.

The previous prime is 7426483. The next prime is 7426537. The reversal of 7426521 is 1256247.

7426521 is a `hidden beast` number, since 7 + 4 + 2 + 652 + 1 = 666.

It is not a de Polignac number, because 7426521 - 2⁶ = 7426457 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7426541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1971 + ... + 4328.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^7426521 is an apocalyptic number.

It is an amenable number.

7426521 is a deficient number, since it is larger than the sum of its proper divisors (3384279).

7426521 is a wasteful number, since it uses less digits than its factorization.

7426521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436 (or 6433 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 7426521 is about 2725.1643987107. The cubic root of 7426521 is about 195.1020373276.

The spelling of 7426521 in words is "seven million, four hundred twenty-six thousand, five hundred twenty-one".